Nonuniversality of front fluctuations for compact colonies of nonmotile bacteria

dc.affiliation.dptoUC3M. Departamento de Matemáticases
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Interdisciplinar de Sistemas Complejos (GISC)es
dc.contributor.authorSantalla, Silvia N.
dc.contributor.authorRodríguez Laguna, Javier
dc.contributor.authorAbad, Jose P.
dc.contributor.authorMarin, Irma
dc.contributor.authorEspinosa, María del Mar
dc.contributor.authorMuñoz-García, Javier
dc.contributor.authorVázquez, Luis
dc.contributor.authorCuerno, Rodolfo
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.description.abstractThe front of a compact bacterial colony growing on a Petri dish is a paradigmatic instance of non-equilibrium fluctuations in the celebrated Eden, or Kardar-Parisi-Zhang (KPZ), universality class. While in many experiments the scaling exponents crucially differ from the expected KPZ values, the source of this disagreement has remained poorly understood. We have performed growth experiments with B. subtilis 168 and E. coli ATCC 25922 under conditions leading to compact colonies in the classically alleged Eden regime, where individual motility is suppressed. Non-KPZ scaling is indeed observed for all accessible times, KPZ asymptotics being ruled out for our experiments due to the monotonic increase of front branching with time. Simulations of an effective model suggest the occurrence of transient nonuniversal scaling due to diffusive morphological instabilities, agreeing with expectations from detailed models of the relevant biological reaction-diffusion processes.en
dc.description.sponsorshipThis work has been supported by Ministerio de Economía y Competitividad, Agencia Estatal de Investigación, and Fondo Europeo de Desarrollo Regional (Spain and European Union) through Grants No. FIS2015- 66020-C2-1-P, FIS2015-69167-C2-1-P, FIS2015-73337-JIN, and BIO2016-79618-R, and by Comunidad Autónoma de Madrid (Spain) Grant No. NANOAVANSENS S2013/MIT3029es
dc.identifier.bibliographicCitationSantalla, S.N., Rodríguez Laguna, J., Abad, J.P., Marín, I., Espinosa, M.M., Muñoz García, J., Vázquez, L. y Cuerno, R. (2018). Nonuniversality of front fluctuations for compact colonies of nonmotile bacteria. Physical Review E, 98 (1), 012407en
dc.identifier.publicationtitlePhysical Review Een
dc.identifier.publicationvolume98 (064027)
dc.publisherAmerican Physical Societyen
dc.relation.projectIDGobierno de España. FIS2015-66020-C2-1-Pes
dc.relation.projectIDGobierno de España. FIS2015-73337-JINes
dc.relation.projectIDGobierno de España. FIS2015-69167-C2-1-Pes
dc.relation.projectIDGobierno de España. BIO2016-79618-Res
dc.relation.projectIDComunidad de Madrid. S2013/MIT-3029es
dc.rights© 2018 American Physical Societyen
dc.rights.accessRightsopen accessen
dc.titleNonuniversality of front fluctuations for compact colonies of nonmotile bacteriaen
dc.typeresearch article*
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